Ambiguity problem in the Earth's surface altimetry

Min Ho Ka, Victor V. Egorov

Research output: Contribution to journalArticlepeer-review


This paper addresses the ambiguity of radar altimetry related to the statistical nature of the Earth's surface roughness. A hypothetic altimetry method, which provides a simple way to quantify the measures of ambiguity, is proposed. Cramer-Rao lower bounds on the variances of estimates for the mean altitude and root-mean-square height of the sea surface are suggested as such quantitative measures. The accuracy of some types of air- and spaceborne radar altimeters is numerically analyzed against the derived lower bounds.

Original languageEnglish
Pages (from-to)3232-3236
Number of pages5
JournalIEICE Transactions on Communications
Issue number11
Publication statusPublished - 2007

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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